The Compressing Tool,splicing Sleeve, cataloged under National Stock Number 5120-01-159-4921, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is National Telephone Supply Co. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-159-4921 |
| Primary Part Number | 51-B4-887 |
| Item Name | Compressing Tool,splicing Sleeve |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | National Telephone Supply Co |
| Status | ACTIVE |
| General Characteristics Item Description | PLIERS TYPE; SINGLE GROOVE; FOR 3/64 IN. OVAL SLEEVES; 18-1/4 IN. O/A LG 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 |
|---|---|
| 51-B4-887 PRIMARY | National Telephone Supply Co (USA) |
NSN 5120-01-159-4921 is a Compressing Tool,splicing Sleeve, manufactured by National Telephone Supply Co, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-159-4921 has 1 manufacturer part number on file: 51-B4-887 (National Telephone Supply Co).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-371-1380. Verify interchangeability with system specifications before substitution.
Key specifications for 51-B4-887: General Characteristics Item Description: PLIERS TYPE; SINGLE GROOVE; FOR 3/64 IN. OVAL SLEEVES; 18-1/4 IN. O/A LG IN. 1 specification is 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.