FF-S-107
Cap Screws
Mumbai · India
Why FF-S-107 Sits Above General Machine Screws
A general-purpose machine screw under FF-S-210 is typically a commodity item — modest strength, often driven with a nut or into a soft tapped hole, chosen mainly for correct size and head style rather than for any real load-bearing precision. A cap screw under FF-S-107 is built for a genuinely different job: driven directly into a tapped hole machined into the mating part itself, in a tensioned joint where the screw’s own strength and dimensional accuracy actually determine whether the assembly holds under load.
That difference shows up in the material and manufacturing, not just the name. Cap screws are commonly alloy steel, sometimes heat treated to a defined strength grade, with tighter thread and body diameter tolerance than a general machine screw needs. Hex socket cap screws in particular allow the screw head to sit recessed in a counterbore, keeping the mating surface flush while still delivering high torque capability through the internal hex drive — a combination general slotted or cross-recessed machine screws simply aren’t built to provide.
Akbar Fasteners Pvt. Ltd. exports to over 50 countries, and our cap screw range is manufactured to controlled thread and body tolerance across hex socket, hex head, fillister, and slotted types, verified under our ISO 9001:2015 quality system.
Where FF-S-107 Genuinely Applies
Direct Tensioned Joint Capability
Drives directly into a tapped hole in the mating part, with strength and tolerance suited to a real load path.
Flush Assembly via Socket Head
Hex socket types recess into a counterbore, keeping the mating surface flush without sacrificing torque capability.
Tighter Thread & Body Tolerance
Manufactured to precision tolerance beyond general machine screw needs, suited to critical machine assemblies.
Verified Mechanical Properties
Batch tensile, hardness, and torque testing confirms genuine cap screw performance, not just dimensional match.
Cap Screw Head Options Explained
Socket Head Cap Screw
Internal hex drive allowing high torque with a flush, recessed head fit in a counterbored hole.
External Hex Cap Screw
Wrench-driven external hex head for high-torque assembly and disassembly with a standard tool.
Fillister Head Cap Screw
Raised cylindrical head profile with a slotted or cross-recessed drive, common in older or specific equipment designs.
Slotted Head Cap Screw
Simple slotted drive variant for lower-torque applications or where socket/hex tools aren’t preferred.
FF-S-107 Cap Screws vs FF-S-210 Machine Screws
Confirming which fastener tier the joint actually needs avoids underspecifying a critical tensioned assembly. This table is the quick reference we use with buyers before quoting.
| Aspect | FF-S-107 Cap Screw | FF-S-210 Machine Screw |
|---|---|---|
| Typical Material | Alloy steel, heat treated | Standard carbon steel/brass |
| Assembly Method | Directly into tapped mating part | Into pre-tapped hole or nut |
| Tolerance Level | Tighter, precision-controlled | Standard commercial tolerance |
| Typical Application | Critical tensioned machine joints | General-purpose assembly |
FF-S-107 Specification Details
Materials We Manufacture In
- Alloy Steel Heat Treated
- Stainless Steel 304 / 316
- Finish Plain / Black Oxide / Zinc
- Coating Available on Request
How Cap Screws Are Made
- Process Cold Formed / Machined
- Heat Treatment As Required per Grade
- Testing Tensile / Hardness / Torque
- Quality Batch Sampled
Available Dimensions
- Nominal Size #4 – 1″ (Inch Series)
- Metric Equivalent Available to Drawing
- Length Custom to Application
- Head Type Socket / Hex / Fillister / Slotted
Application Areas
Wherever a genuinely tensioned machine-part joint needs precision-tolerance, high-strength fastening.
Precision Machine Assembly
machine part joints
Fixture & Jig Assembly
socket head applications
Government & Defense Equipment
precision cap screw needs
Mold & Die Assembly
mold and die components
Machine Tool Assembly
machine tool bolting
Aerospace & Precision Manufacturing
tensioned fastening
Robotics & Automation Equipment
for automated equipment
General High-Strength Assembly
federally specified projects
Standard Export Documentation
Prepared as standard practice for every FF-S-107 cap screw shipment.
Mill Test Certificate (MTC)
Heat number, chemical composition, and mechanical property verification for every lot.
Certificate of Conformance
Confirms the shipment matches the purchase order head type/material specification in full.
Tensile & Hardness Test Records
Batch-level testing confirming genuine cap screw strength grade performance.
Certificate of Origin (COO)
Confirms India as country of manufacture for destination customs purposes.
NABL Accredited Test Reports
Independent mechanical and dimensional testing available on request for critical applications.
Commercial Invoice & Packing List
Itemized value, Incoterm, and detailed carton/weight breakdown for customs clearance.
Internationally Recognised Standards Coverage
Related Fastener Grades & Materials
FF-S-210 Machine Screws
The general-purpose machine screw specification for lower-tier assembly needs.
View FF-S-210 →FF-S-200 Tapping Screws
Our companion self-tapping screw specification for sheet metal and plastic assembly.
View FF-S-200 →High Tensile Bolts Specifications
Metric property class reference relevant to matching cap screw strength grades.
View High Tensile Specs →Fasteners Manufacturer & Exporter to the USA
Our broader capability manufacturing to ASTM/ASME and US federal standards.
View USA Export Guide →Need a Precision,
High-Strength Tensioned Fastener?
Tell us your joint design, head type preference, and load requirement — we’ll confirm specification and manufacture to controlled tolerance with full documentation. Akbar Fasteners Pvt. Ltd. responds within 24 hours.
Sales: +91 724 0000 733 · Support: +91 800 9315 333 · sales@akbarfasteners.in