The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-310-5822, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fastener Technology Corp. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-310-5822 |
| Primary Part Number | 135601-121 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastener Technology Corp |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN |
| Head Height | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN |
| Fastener Length | 2.438 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | TT-E-489 FED SPEC SINGLE TREATMENT RESPONSE HEAD |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Color | RED HEAD |
| Surface Treatment | ENAMEL HEAD |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 135601-121 | Raytheon Company (USA) |
| 135601-121 | H-K Connecticut Holding Company (USA) |
| 135601-121 PRIMARY | Fastener Technology Corp (USA) |
| 135601-121 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 135601-121 | 5/2 Secondary reference U.S. Government activity |
| 135601-121 | 5/9 Secondary reference Naval Submarine Base Bangor |
NSN 5305-01-310-5822 is a Screw,cap,socket Head, manufactured by Fastener Technology Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-310-5822 has 4 manufacturer part numbers on file: 135601-121 (Raytheon Company), 135601-121 (H-K Connecticut Holding Company), 135601-121 (Fastener Technology Corp), 135601-121 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 135601-121: Width Across Flats: 0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN; Head Height: 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN; Fastener Length: 2.438 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN; Surface Treatment Document and Classification: TT-E-489 FED SPEC SINGLE TREATMENT RESPONSE HEAD. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.