PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P51Block,tackle

Rock Exotica · NSN 3940-01-632-7877 · FSC 3940 · No Item Name Available
Verified by PartsTable
NSN 3940-01-632-7877 — this item is cataloged by the U.S. Government under National Stock Number 3940-01-632-7877. Primary manufacturer part number: P51.
Features
  • Block,tackle — FSC 3940
  • Supplementary Features: BREAKING STRENGTH 36 KN;WORKING LOAD 8 KN
  • Tackle Accommodated Type: FIBROUS ROPE
  • Sheave Outside Diameter: 1.5 INCHES NOMINAL IN
  • Maximum Tackle Diameter Accommodated: 13.0 MILLIMETERS MM
  • Becket Quantity: 1
  • Attachment Style: ROUND SWIVEL EYE
  • Style Designator: PULLEY PATTERN
Applications
  • Applications requiring Aluminum Shell construction
General Description

The Block,tackle, cataloged under National Stock Number 3940-01-632-7877, is classified within Federal Supply Class 3940 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is Rock Exotica. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3940-01-632-7877
Primary Part NumberP51
Item NameBlock,tackle
FSC / FSG3940 / 39 — No Item Name Available
ManufacturerRock Exotica
StatusACTIVE
Supplementary FeaturesBREAKING STRENGTH 36 KN;WORKING LOAD 8 KN
Tackle Accommodated TypeFIBROUS ROPE
Sheave Outside Diameter1.5 INCHES NOMINAL IN
Maximum Tackle Diameter Accommodated13.0 MILLIMETERS MM
Becket Quantity1
Attachment StyleROUND SWIVEL EYE
Style DesignatorPULLEY PATTERN
MaterialALUMINUM SHELL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3010-00-125-86326460011 INTERCHANGEABLE
Gear Assembly,speed Increaser
Ed Etnyre & Co
4320-00-137-9692 INTERCHANGEABLE
Pump Unit,reciprocating
3460-00-233-7987 INTERCHANGEABLE
Pilot,counterbore
9150-00-250-0931 INTERCHANGEABLE
Petrolatum
5120-00-288-6482P-51 INTERCHANGEABLE
Punch,drive Pin
Ampco Partners, Ltd. Dba Ampco Safety Tools
3110-00-516-5289203TF INTERCHANGEABLE
Bearing,ball,annular
Fag Bearings Corporation
2940-00-891-6666NW13203 INTERCHANGEABLE
Filter Element,fluid
Tld Wollard Llc
5330-00-959-9879 INTERCHANGEABLE
Gasket
4320-01-078-22321C6934P19 INTERCHANGEABLE
Pump,hydraulic Ram,hand Driven
Rhinestahl Corporation Dba Rhinestahl
6675-01-243-7014P-51-18IN INTERCHANGEABLE
Scale,drafting
Vemco Drafting Products Corporation Dba Vemcocorp.com
Cross-Reference Index
Part NumberManufacturer
P51 PRIMARY Rock Exotica (USA)
Related Parts
3010-00-125-8632INTERCHANGEABLE
GEAR ASSEMBLY,SPEED INCREASER
6460011
4320-00-137-9692INTERCHANGEABLE
PUMP UNIT,RECIPROCATING
3460-00-233-7987INTERCHANGEABLE
PILOT,COUNTERBORE
9150-00-250-0931INTERCHANGEABLE
PETROLATUM
5120-00-288-6482INTERCHANGEABLE
PUNCH,DRIVE PIN
P-51
3110-00-516-5289INTERCHANGEABLE
BEARING,BALL,ANNULAR
203TF
2940-00-891-6666INTERCHANGEABLE
FILTER ELEMENT,FLUID
NW13203
5330-00-959-9879INTERCHANGEABLE
GASKET
4320-01-078-2232INTERCHANGEABLE
PUMP,HYDRAULIC RAM,HAND DRIVEN
1C6934P19
6675-01-243-7014INTERCHANGEABLE
SCALE,DRAFTING
P-51-18IN
3020-01-532-1894INTERCHANGEABLE
PULLEY,GROOVE
P51

Frequently Asked Questions

What is NSN 3940-01-632-7877?

NSN 3940-01-632-7877 is a Block,tackle, manufactured by Rock Exotica, classified under FSC 3940 (No Item Name Available). Status: active.

What are the part numbers for NSN 3940-01-632-7877?

NSN 3940-01-632-7877 has 1 cross-referenced part number: P51 (Rock Exotica).

What NSN replaces 3940-01-632-7877?

There are 11 known substitutes for 3940-01-632-7877: 3010-00-125-8632, 4320-00-137-9692, 3460-00-233-7987 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P51?

Key specifications for P51: Supplementary Features: BREAKING STRENGTH 36 KN;WORKING LOAD 8 KN; Tackle Accommodated Type: FIBROUS ROPE; Sheave Outside Diameter: 1.5 INCHES NOMINAL IN; Maximum Tackle Diameter Accommodated: 13.0 MILLIMETERS MM. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com