PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SA7Head,safety,pressure Relief

Bs&b Safety Systems Llc · NSN 4820-01-148-5987 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-148-5987 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-148-5987. Primary manufacturer part number: SA7.
Features
  • Head,safety,pressure Relief — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Bs&b Safety Systems Llc
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Head,safety,pressure Relief, cataloged under National Stock Number 4820-01-148-5987, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Bs&b Safety Systems Llc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-148-5987
Primary Part NumberSA7
Item NameHead,safety,pressure Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerBs&b Safety Systems Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4320-00-218-4192BS5-1765PC20,21AND22 INTERCHANGEABLE
Connecting Rod,piston
Circor Naval Solutions Llc Dba Warren Pumps
4820-00-454-1085 INTERCHANGEABLE
Cock,drain
5340-01-465-3063A7 INTERCHANGEABLE
Cover,access
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
Cross-Reference Index
Part NumberManufacturer
SA7 PRIMARY Bs&b Safety Systems Llc (USA)
Related Parts
4320-00-218-4192INTERCHANGEABLE
CONNECTING ROD,PISTON
BS5-1765PC20,21AND22
4820-00-454-1085INTERCHANGEABLE
COCK,DRAIN
5340-01-465-3063INTERCHANGEABLE
COVER,ACCESS
A7

Frequently Asked Questions

What is NSN 4820-01-148-5987?

NSN 4820-01-148-5987 is a Head,safety,pressure Relief, manufactured by Bs&b Safety Systems Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-148-5987?

NSN 4820-01-148-5987 has 1 cross-referenced part number: SA7 (Bs&b Safety Systems Llc).

What NSN replaces 4820-01-148-5987?

There are 3 known substitutes for 4820-01-148-5987: 4320-00-218-4192, 4820-00-454-1085, 5340-01-465-3063. Verify interchangeability with system specifications before substitution.

What are the specifications of SA7?

Key specifications for SA7: Special Features: STAINLESS STEEL,303; 0.250 IN. EXTERNAL PIPE THD; BORE 0.250 IN. DIA; 2.062 IN. O/A H; HEX ACROSS FLATS 1.250 IN. INLET; 1.125 IN. OUTLET IN. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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