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Socket Head Cap Screw

Model / MPN: 4201811-1102 | NSN: 5305-01-467-6074
ITAR Registered seal

An externally threaded fastener whose threaded portion is of one diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Product Details
NATO Stock Number
Sold in multiples of
1 EA
Thread Class
Thread Direction
Thread Length
1.250 inches
Fastener Length
1.250 inches
Head Diameter
Between 0.262 inches and 0.270 inches
Internal Drive Style
End Application
Valve, pressure; seawolf class ssn
Thread Diameter
0.500 inches
Width Across Flats
0.140 inches
Thready Qty Per Inch (tpi)
Stainless steel
Material Specification
Mil-s-7720 military standard single material response and qq-s-763 federal specification single material response and astma276 assn standard single material response or ff-s-86 federal specification single material response
Thread Series Designator

Pricing and Availability

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4201811-1102 Cross Reference
  • 284046-0002
  • 284046-0002-91
  • J210A0813-20CA