PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11400Mount Subassembly

Aimpoint Inc Dba Aimpoint Inc · NSN 1240-01-551-5755 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-551-5755 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-551-5755. Primary manufacturer part number: 11400.
Features
  • Mount Subassembly — FSC 1240
  • Component Quantity: 1
  • Major Components: TWIST MOUNT RING 1; TWIST MOUNT BASE 1
  • 3 verified cross-references
  • Primary manufacturer: Aimpoint Inc Dba Aimpoint Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Mount Subassembly, cataloged under National Stock Number 1240-01-551-5755, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Aimpoint Inc Dba Aimpoint Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, 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
NSN1240-01-551-5755
Primary Part Number11400
Item NameMount Subassembly
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerAimpoint Inc Dba Aimpoint Inc
StatusACTIVE
Component Quantity1
Major ComponentsTWIST MOUNT RING 1; TWIST MOUNT BASE 1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-189-9282 INTERCHANGEABLE
Drill,twist
5133-00-189-9283 INTERCHANGEABLE
Drill,twist
5133-00-228-1344 INTERCHANGEABLE
Drill,twist
5315-00-276-637412238 INTERCHANGEABLE
Pin,straight,headed
Curtiss-Wright Controls, Inc. Div Actuation Division
5330-00-430-942611400 INTERCHANGEABLE
Gasket
Komatsu America Corporation
1005-00-512-768611400 INTERCHANGEABLE
Tube Assy,gun Charg
Nobles Worldwide, Inc.
2910-00-512-78170-11400 INTERCHANGEABLE
Carburetor,float
Zenith Fuel Systems Llc
5331-00-731-7871F37020-120 INTERCHANGEABLE
O-Ring
Funk Mfg Co Sub of Deere and Co
5120-00-757-0773 INTERCHANGEABLE
Puller,mechanical
4730-00-778-3500 INTERCHANGEABLE
Adapter Straight Pi
Cross-Reference Index
Part NumberManufacturer
11400 PRIMARY Aimpoint Inc Dba Aimpoint Inc (USA)
122385 Aimpoint Inc Dba Aimpoint Inc (USA)
12238 Aimpoint Inc Dba Aimpoint Inc (USA)
Related Parts
5133-00-189-9282INTERCHANGEABLE
DRILL,TWIST
5133-00-189-9283INTERCHANGEABLE
DRILL,TWIST
5133-00-228-1344INTERCHANGEABLE
DRILL,TWIST
5315-00-276-6374INTERCHANGEABLE
PIN,STRAIGHT,HEADED
12238
5330-00-430-9426INTERCHANGEABLE
GASKET
11400
1005-00-512-7686INTERCHANGEABLE
TUBE ASSY,GUN CHARG
11400
2910-00-512-7817INTERCHANGEABLE
CARBURETOR,FLOAT
0-11400
5331-00-731-7871INTERCHANGEABLE
O-RING
F37020-120
5120-00-757-0773INTERCHANGEABLE
PULLER,MECHANICAL
4730-00-778-3500INTERCHANGEABLE
ADAPTER STRAIGHT PI
5840-00-847-7786INTERCHANGEABLE
ELECTRONIC,SUBASSEM
11400
5120-00-870-6928INTERCHANGEABLE
SCREWDRIVER BIT SET AND HANDLE
11400

Frequently Asked Questions

What is NSN 1240-01-551-5755?

NSN 1240-01-551-5755 is a Mount Subassembly, manufactured by Aimpoint Inc Dba Aimpoint Inc, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-01-551-5755?

NSN 1240-01-551-5755 has 3 cross-referenced part numbers: 11400 (Aimpoint Inc Dba Aimpoint Inc), 122385 (Aimpoint Inc Dba Aimpoint Inc), 12238 (Aimpoint Inc Dba Aimpoint Inc).

What NSN replaces 1240-01-551-5755?

There are 12 known substitutes for 1240-01-551-5755: 5133-00-189-9282, 5133-00-189-9283, 5133-00-228-1344 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11400?

Key specifications for 11400: Component Quantity: 1; Special Features: SEPARATE RING FOR TWIST MOUNT; End Item Identification: AIMPOINT 3XMAG TWIST MOUNT; Part Name Assigned by Controlling Agency: AIMPOINT 3XMAG TWIST MOUNT RING, SEPARATE. 5 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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