The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-253-7955, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Nor-Cal Supply Co. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-253-7955 |
| Primary Part Number | NAS1191C04P4 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Nor-Cal Supply Co |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Fastener Length | 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.169 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Hardness Rating | 248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.178 INCHES MINIMUM AND 0.183 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 |
|---|---|
| NAS1191C04P4 PRIMARY | Nor-Cal Supply Co (USA) |
| NAS1191C04P4 PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| NAS1191C04P4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1191C04P4 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1191C04P4 PRIMARY | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1191C04P4 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| NAS1191C04P4 PRIMARY | Apcom Inc (USA) |
| NAS1191C04P4 | Satair A/s (DNK) |
| NAS1191C04P4 | Huck International, Inc (USA) |
| NAS1191C04P4 PRIMARY | Long-Lok Llc (USA) |
| NAS1191C04P4 PRIMARY | Plastic and Metal Products Corporation (USA) |
| NAS1191C04P4 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| NAS1191C04P4 | 5/9 Secondary reference F and C Sales Inc |
| NAS1191C04P4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1191C04P4 | 5/9 Secondary reference Air Industries Co Inc |
| NAS1191C04P4 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1191C04P4 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191C04P4 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191C04P4 | 5/9 Secondary reference U.S. Government activity |
| LK1191C04P4 | 5/9 Secondary reference Torkon Fastener Corp |
| NAS1191C04P4L | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-253-7955 is a Screw,cap,socket Head, manufactured by Nor-Cal Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-253-7955 has 12 manufacturer part numbers on file: NAS1191C04P4 (Nor-Cal Supply Co), NAS1191C04P4 (Nd Industries Inc Div Eastern Division), NAS1191C04P4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1191C04P4 (Fastener Innovation Technology, Inc. Dba F I T), NAS1191C04P4 (Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc) and 7 more.
Key specifications for NAS1191C04P4: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN; Fastener Length: 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN. 19 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.