PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

O-C-275Ammonium Thiosulfate,photographi

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 6750-00-274-6725 · FSC 6750 · No Item Name Available
Verified by PartsTable
NSN 6750-00-274-6725 — this item is cataloged by the U.S. Government under National Stock Number 6750-00-274-6725. Primary manufacturer part number: O-C-275.
Features
  • Ammonium Thiosulfate,photographi — FSC 6750
  • Composition and Percentage: 60.0 MINIMUM BY VOLUME AMMONIUM THIOSULFATE
  • Physical Form: LIQUID
  • Nondefinitive Spec/std Data: VII CLASS
  • Quantity Within Each Unit Package: 5.000 POUNDS LBS
  • 2 verified cross-references
  • Primary manufacturer: Federal Specifications Promulgated by General Services Administration Washington DC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ammonium Thiosulfate,photographi, cataloged under National Stock Number 6750-00-274-6725, is classified within Federal Supply Class 6750 (No Item Name Available) of the Photographic Equipment group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6750-00-274-6725
Primary Part NumberO-C-275
Item NameAmmonium Thiosulfate,photographi
FSC / FSG6750 / 67 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Composition and Percentage60.0 MINIMUM BY VOLUME AMMONIUM THIOSULFATE
Physical FormLIQUID
Nondefinitive Spec/std DataVII CLASS
Quantity Within Each Unit Package5.000 POUNDS LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6750-00-053-8364 INTERCHANGEABLE
Formaldehyde Solution,photograph
6625-00-078-5695407-733 INTERCHANGEABLE
Meter,multiple Scale
Heathkit Co Inc Dba Heathkit Educational Systems
6750-00-141-6180 INTERCHANGEABLE
Methylaminophenol Sulfate,photog
6750-00-174-5455 INTERCHANGEABLE
Potassium Ferricyanide,photograp
6750-00-241-8425 INTERCHANGEABLE
Sodium Carbonate,monohydrate,pho
5340-00-255-43993547 INTERCHANGEABLE
Cap,protective,dust and Moisture
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
6750-00-264-5866 INTERCHANGEABLE
Sodium Carbonate,monohydrate,pho
6750-00-274-6731 INTERCHANGEABLE
Potassium Bromide,photographic
2530-00-300-6798391320C91 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Navistar Intl Corp Truck Br Ohio Plant
5325-00-489-3086Z3114 INTERCHANGEABLE
Grommet,nonmetallic
Minor Rubber Co Inc
Cross-Reference Index
Part NumberManufacturer
O-C-275 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
3547 Mallinckrodt Inc Anesthesia Products (USA)
Related Parts
6750-00-053-8364INTERCHANGEABLE
FORMALDEHYDE SOLUTION,PHOTOGRAPH
6625-00-078-5695INTERCHANGEABLE
METER,MULTIPLE SCALE
407-733
6750-00-141-6180INTERCHANGEABLE
METHYLAMINOPHENOL SULFATE,PHOTOG
6750-00-174-5455INTERCHANGEABLE
POTASSIUM FERRICYANIDE,PHOTOGRAP
6750-00-241-8425INTERCHANGEABLE
SODIUM CARBONATE,MONOHYDRATE,PHO
5340-00-255-4399INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
3547
6750-00-264-5866INTERCHANGEABLE
SODIUM CARBONATE,MONOHYDRATE,PHO
6750-00-274-6731INTERCHANGEABLE
POTASSIUM BROMIDE,PHOTOGRAPHIC
2530-00-300-6798INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
391320C91
5325-00-489-3086INTERCHANGEABLE
GROMMET,NONMETALLIC
Z3114
3110-00-554-3197INTERCHANGEABLE
BEARING,BALL,ANNULAR
6675-00-641-3166INTERCHANGEABLE
PROTRACTOR,SEMICIRCULAR

Frequently Asked Questions

What is NSN 6750-00-274-6725?

NSN 6750-00-274-6725 is a Ammonium Thiosulfate,photographi, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 6750 (No Item Name Available). Status: active.

What are the part numbers for NSN 6750-00-274-6725?

NSN 6750-00-274-6725 has 2 cross-referenced part numbers: O-C-275 (Federal Specifications Promulgated by General Services Administration Washington DC), 3547 (Mallinckrodt Inc Anesthesia Products).

What NSN replaces 6750-00-274-6725?

There are 12 known substitutes for 6750-00-274-6725: 6750-00-053-8364, 6625-00-078-5695, 6750-00-141-6180 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of O-C-275?

Key specifications for O-C-275: Composition and Percentage: 60.0 MINIMUM BY VOLUME AMMONIUM THIOSULFATE; Physical Form: LIQUID; Nondefinitive Spec/std Data: VII CLASS; Quantity Within Each Unit Package: 5.000 POUNDS LBS. 4 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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