The Screw,close Tolerance, cataloged under National Stock Number 5305-01-043-8048, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-043-8048 |
| Primary Part Number | HT193LB-08H21 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Material Document and Classification | NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| HT193LB-08H21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT193LB-08H21 PRIMARY | Hi-Shear Corporation (USA) |
| GB511J08D21 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| T151-08D21 | 5/9 Secondary reference U.S. Government activity |
| T151-08D21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| GB511J08D21 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 67077D-08-21 | 3/2 Design control — primary reference U.S. Government activity |
| BM1009-08H21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM1009-08H21 | 5/9 Secondary reference U.S. Government activity |
| HT8009-08D21 | 3/2 Design control — primary reference U.S. Government activity |
| 67077D-08-21 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-043-8048 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-043-8048 has 3 manufacturer part numbers on file: HT193LB-08H21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT193LB-08H21 (Hi-Shear Corporation), GB511J08D21 (Huck International, Inc).
Key specifications for HT193LB-08H21: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Material Document and Classification: NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Part Name Assigned by Controlling Agency: NAVY SPECIAL PROJECT. 5 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.