The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-657-0427, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-657-0427 |
| Primary Part Number | 0.250-20UNC-3AX0.500LG STLL1 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 0.250-20UNC-3AX0.500LG STLL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-11 ITEM 110L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2641-405-11 ITEM 110 | 3/1 Design control — primary reference U.S. Government activity |
| 0.250-20UNC-3AX0.500LG STL | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-657-0427 is a Screw,cap,socket Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-657-0427 has 2 manufacturer part numbers on file: 0.250-20UNC-3AX0.500LG STLL1 (Naval Inventory Control Point Mechanicsburg), 2641-405-11 ITEM 110L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 0.250-20UNC-3AX0.500LG STLL1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: CAPSCREW, SLFLK; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 2 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.